Joint International Conference on Long-term Experiments ...

watersurface, but their roots are touching the bottom sediments of the water. Such plants
are: the Nymphaea alba, the Nuphar lutea, the Lemna ssp. and the Wolffia arrhiza.
The submersed plants are another category of the aquatic flora, which are fixed in
the underwater ground (in some of the cases the roots are missing), and their leaves and
stems are entirely under the water surface. They play several roles in an aquatic habitat
like: production of the organic material, oxygen liberation, transfer of material
providing of life place for the flora and fauna of the underwater ground. Many plants
belong to this category, but we will mention just some of them like: Potamogeton
pectinátu, Elodea canadensis, Chara ssp., Lemna trisulca and Ceratophyllum
demersum.
Final conclusion, remarks
The wastewater treatment with constructed wetlands is the same, or is similarly efficient
as the classical purification systems, so that they could be used in the localities from the
Valea Ierului (Érmellék) region. Taking into consideration that in this area the most
localities don’t have the infrastructure to perform a wastewater treatment, we think, that
this kind of technology could assure a good solution, or at least an alternative for the
problems. The building of the system is not as expensive as the building of the classic
one and thus the capital that has not been used can be reinvested and used in other area
of regional development.
In conclusion this technology can solve in a direct way the wastewater
treatment issue in the region, and in an indirect way, on long term, can strongly
contribute to the local and regional development.
REFERENCES
• Veliky J. (2005): Érmellék Kalauz. Hatvani István Szakkolégium, Debrecen. 21-27,
79-10 p.
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